Unitarity and normalization of string amplitudes
Jun, 1992
25 pages
Published in:
- Nucl.Phys.B 392 (1993) 345-368
Report number:
- SISSA-94-92-EP,
- DSF-T-NA-92-13
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Abstract: (Elsevier)
The normalization of string amplitudes is fixed at arbitrary genus by the requirement that the elastic two-particle scattering amplitude exponentiates in the Regge regime. We use this approach to determine the overall normalization of the N -string g -loop vertex in three cases: for the bosonic string; for the type II superstring in the Neveu-Schwarz sector; and for a heterotic string model in the sector containing Yang-Mills interactions. We present a regularization procedure that removes the tachyonic contribution from the bosonic string calculation.- string model: heterotic
- supersymmetry: superfield
- scattering amplitude: higher-order
- higher-order: scattering amplitude
- partition function
- vertex function
- boson: string model
- field theory: tachyon
- postulated particle: graviton
- analytic properties
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